Chinese Journal of Catalysis ›› 2023, Vol. 46: 113-124.DOI: 10.1016/S1872-2067(22)64175-5
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Zhuogen Lia, Qadeer Ul Hassana, Weibin Zhangb, Lujun Zhua, Jianzhi Gaoa, Xianjin Shic, Yu Huangc, Peng Liua, Gangqiang Zhua,*()
Received:
2022-09-20
Accepted:
2022-10-08
Online:
2023-03-18
Published:
2023-02-21
Contact:
*E-mail: zgq2006@snnu.edu.cn (G. Zhu).
Supported by:
Zhuogen Li, Qadeer Ul Hassan, Weibin Zhang, Lujun Zhu, Jianzhi Gao, Xianjin Shi, Yu Huang, Peng Liu, Gangqiang Zhu. Promotion of dual-reaction pathway in CO2 reduction over Pt0/SrTiO3‒δ: Experimental and theoretical verification[J]. Chinese Journal of Catalysis, 2023, 46: 113-124.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(22)64175-5
Fig. 1. XRD patterns (a), EPR spectra (b), and UV-Vis absorption spectra (c) of pristine STO, OVs-STO, and Pt-OVs-STO; the inset picture was the calculated band gap of each sample (c), the band structure and spatial state density of Pt-OVs-STO (d).
Fig. 2. AC-HAADF-STEM images of Pt-OVs-STO and particle size distribution (a?e), local atomic arrangements of STO under [?1,0] direction (c), Pt NPs (d), the selection line spectrum (e), and the corresponding line intensity profiles (f), AC-HAADF-STEM image of single Pt0 NP anchored on STO (g) and corresponding elements EDS mapping (h?k).
Fig. 4. H2, CH4, and CO yields of pristine STO (a), OVs-STO (b), Pt-OVs-STO (c) at different temperatures from 50 to 250 °C under UV-visible light (20 mg catalyst, 15 mW·cm?2); the alternating continuous thermal-photothermal reactions of Pt-OVs-STO under 250 °C, the switch time is 1 h (d).
Fig. 5. (a) H2 yields on pristine STO, OVs-STO, and Pt-OVs-STO at different temperatures from 50 to 250 °C under UV-visible light using Ar instead of CO2. (b) The adsorption energy of pristine STO, OVs-STO, and Pt-OVs-STO for CO2 and H2O; the activation barrier of CO2 (c) and H2O (d) of pristine STO, OVs-STO, and Pt-OVs-STO. (e) The gas products of Pt-OVs-STO at different CO2 concentration at 200 °C. (f) Mixed gases CO2/H2/N2 for CO2 hydrogenation under pristine STO, OVs-STO, and Pt-OVs-STO at 200 °C.
Fig. 7. Differential charge density calculations for an overall view, CO2 and H2O adsorption model of pristine STO, OVs-STO, and Pt-OVs-STO, the yellow area represents the charge dissipation while the wine red area represents the charge accumulation.
Fig. 8. The in situ FTIR spectra of Pt-OVs-STO under 250 °C. (a) 0 to 15 min is the dark process and 15 to 30 min is the irradiation process. Relative energy change of each step of H2O splitting (b), CO2RR under H2 (c) or proton (d).
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